Hayward ADU Standards
Prefab ADU in Hayward
What is an ADU (Accessory Dwelling Unit)?
An ADU is an independent residential unit on the same lot as a primary home, providing additional living space, rental opportunities, or multi-generational housing. A Prefab ADU is a permanent, factory-built backyard home that meets local zoning and building codes, making it ideal for long-term living.
Tiny homes, often confused with prefab ADUs, are small, mobile units built on wheels. While both can qualify as ADUs, prefab ADUs are stationary and built for durability, whereas tiny homes face more zoning challenges due to their mobility.
Planning to Build an ADU in Hayward?
With the implementation of ADU regulations, Hayward has seen a rise in ADU construction. If you’re planning to build an ADU, LiveLarge is here to guide you through key development requirements for a smooth and successful project.
Types of ADUs
- Detached – A new structure separate from the primary residence.
- Attached – A new unit attached to the primary residence.
- Conversion – A conversion of existing space within the primary home or a detached accessory structure.
- Junior Accessory Dwelling Unit (JADU) – A conversion of existing space, up to 500 square feet, contained entirely within a single-family residence.
Zoning and Lot Eligibility
ADUs and JADUs are generally allowed on properties zoned for residential or mixed-use development.
- Single-Family Properties
- A maximum of one (1) ADU and one (1) JADU is allowed per lot, provided the structure meets zoning and building code standards.
- Multi-Family Properties
- Attached ADUs: Multiple ADUs may be created, up to 25% of the number of existing units, by converting non-livable spaces such as storage rooms, boiler rooms, passageways, attics, basements, or garages.
- Detached ADUs: A maximum of two (2) detached ADUs are allowed on existing multi-family properties.
Size and Floor Area
Attached ADU:
0-1 Bedroom: Maximum 850 sqft
2 Bedrooms: Maximum 1,000 sqft
If an ADU is greater than 1,000 sqft, the total floor area cannot exceed 50% of the primary dwelling(s) floor area or 1,200 sqft, whichever is less.
Detached ADU:
0-1 Bedroom: Maximum 850 sqft
2 Bedrooms: Maximum 1,000 sqft
If an ADU is greater than 1,000 sqft, the total floor area cannot exceed 50% of the primary dwelling(s) floor area or 1,200 sqft, whichever is less.
JADU (Junior ADU):
Maximum 500 sqft
Setbacks and Height
- Attached ADU:
- Setbacks: 4-foot side/rear setbacks
- Height: 16 feet
- Detached ADU:
- Setbacks: 4-foot side/rear setbacks, 6-foot distance from the primary residence, and 20-foot front setback
- Height: 16 feet
- Conversion of Existing Area:
- No setbacks required if converting an existing living area or accessory structure within the same dimensions as the original structure.
- JADU (Junior ADU):
- Setbacks: 4-foot side/rear setbacks.
Parking Requirements
- JADUs are always exempt from parking requirements.
- ADUs are not required to provide parking but may include covered, uncovered, or tandem parking if compliant with the City’s code requirements.
For more details, contact the Hayward Planning Division at (510) 583-4216 or via email at planning.division@hayward-ca.gov.
Why Choose LiveLarge Prefab ADUs?
LiveLarge Prefab ADUs are designed to meet Hayward’s detached ADU regulations, offering a hassle-free way to maximize property value. With pre-approved designs and expert guidance, we streamline the approval process for a smooth experience.
Let LiveLarge be your trusted partner in your ADU journey. With our expertise in design, construction, and compliance, we ensure your project meets local standards and maximizes your property’s potential. Contact us today to start your ADU project!
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